Virtual Serial Port Driver XP4 creates any number of pure virtual serial ports pairs in your system which are virtually connected to each other. You can transfer files, exchange data or do whatever you want as it was real serial ports. For example, you can create virtual pair COM5-COM6. In this case all data sent by other applications to virtual serial port COM5 arrives at virtual serial port COM6 and all data sent to COM6 arrives at COM-port 5.